A method for preparing plastic modifier with fly ash
A technology of modifier and fly ash, which is applied in the chemical industry, can solve the problems of low utilization rate and achieve the effect of wide raw material, small particle size and low development cost
Inactive Publication Date: 2017-02-22
山西漳电华旗新材料有限公司
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Problems solved by technology
According to data, at present, my country's industrial coal combustion produces 200-400 million tons of fly ash every year, and the utilization rate is low and mainly low-end utilization, which has brought a huge test to environmental problems and has become an urgent problem to be solved
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[0026] The process flow of preparing plastic modifier with fly ash is as follows: figure 1 As shown, including the following process links:
[0027] (1) Sintered acid solution
[0028] Take the fly ash and roast it at 500°C for 30 minutes; after taking it out, add 85%wt concentrated H 2 SO 4 , and monitor the pH of the system. After the pH of the system tends to be constant at about 2, add water twice the mass of fly ash, stir evenly, and then let it stand. After stratification occurs, filter residue and filtrate are obtained by filtration.
[0029] (2) Preparation of CaSiO from filter residue 3 precipitation
[0030] Slowly add concentrated NaOH solution with a concentration of 25%wt to the filter residue produced in (1) for alkali dissolution. When the pH is stable at about 7, take the clear liquid and slowly add Ca(OH) 2 supernatant, resulting in CaSiO 3 Precipitation, stop adding Ca(OH) after the speed of precipitation is significantly reduced 2 Serum.
[0031] (3)...
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Abstract
The invention discloses a method for preparing plastic modifiers by using pulverized fuel ash. The method comprises the following steps: sintering pulverized fuel ash serving as a raw material and performing acid dissolution to obtain filter residues and filtrate; preparing a CaSiO3 plastic modifier and an Al(OH)3 plastic modifier by using the filter residues and the filtrate respectively. Major raw material powder such as pulverized fuel ash and concentrated sulfuric acid are derived from waste residues and waste gas produced after burning of coal, so that the raw material source is extensive and the development cost is low; the prepared CaSiO3 and Al(OH)3 are small in average particle diameters and can be directly applied to plastic modification; by adopting the CaSiO3 plastic modifier, the strength, wear resistance and heat resistance of plastic materials can be enhanced effectively; by adopting the Al(OH)3 plastic modifier, the strength, wear resistance, heat resistance and flame retardance of plastic materials can be enhanced effectively.
Description
technical field [0001] The invention relates to the field of chemical industry, in particular to a method for preparing a plastic modifier with fly ash. Background technique [0002] The national "Twelfth Five-Year" development plan regards energy conservation and emission reduction as the primary issue of industrial development, and at the same time, resin-based composite materials are one of the development priorities of new materials. According to data, at present, my country's industrial coal combustion produces 200-400 million tons of fly ash every year, and the utilization rate is low and mainly low-end utilization, which has brought a huge test to environmental problems and has become an urgent problem to be solved. [0003] The main components of fly ash are CaO, SiO 2 、Al 2 o 3 Metal oxides such as CaSiO can be obtained after separation and treatment by certain chemical methods. 3 and Al(OH) 3 , for the preparation of plastic modifiers. Contents of the invent...
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IPC IPC(8): C08K9/06C08K9/04C08K3/34C08K3/22
Inventor 董金虎冯小明刘玉侠王宁宁王星贺志荣蒋鹏唐玲张永宏
Owner 山西漳电华旗新材料有限公司